How do I know my driver support RSS?
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From: Yuehai Xu <hidden>
Date: 2012-03-03 21:26:00
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Hi,
The Linux version is 3.1.4,
ethtool -i eth0:
driver: bnx2
version: 2.1.11
firmware-version: 5.2.7 bc 5.2.2 NCSI 2.0.8
bus-info: 0000:01:00.0
cat /proc/interrupts | grep eth0:
75: 21055507 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-0
76: 13525 16727512 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-1
77: 11057 0 15796802 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-2
78: 186481 0 0 31960030 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-3
79: 122343 0 0 0 32711648
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-4
80: 391642 0 0 0 0
164243994 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-5
81: 681084 0 0 0 0
0 41645128 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-6
82: 39207 0 0 0 0
0 0 30973807 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-7
From /proc/interrupts I know that my network card has 8 rx/tx queues.
However, after reading http://code.google.com/p/kernel/wiki/NetScalingGuide#RSS:_Receive_Side_Scaling, I still have no idea whether I have enabled RSS for my network card. Since I read the following statements from a paper, "we use a separate hardware receive and transmit queue for each core and configure the IXGBE to inspect the port number in each incoming packet header, place the packet on the queue dedicated to the associated memcached's core, and deliver the receive interrupt to that core." and the background of this configuration is that each memcached is pinned to a separate core and has its own UDP port. It seems that IXGBE's driver can detect UDP packets according to their port numbers and put these packets into corresponding receive queues in the hardware, is this achieved by configuring RSS in IXGBE? If it is, I am wondering whether bnx2 supports RSS and whether it can configure in the same way. I appreciate any help for this. Thanks, Yuehai